Square/Rectangular
Square and rectangular bellows are available in almost any size or material to meet a variety of applications or environments. Mounting may be by collar or flange. Typical applications include expansion connections between ducts, protection of translating mechanical devices, or protection of square or rectangular machined parts.

Thickness Material Coating and Color Material Base Fiber Ambient Degrees Temp. Range Applications
.018"  (.45mm) Black Neoprene Nylon -60 F to +250 F  -51 C to +121 C  (Cr - Chloroprene Polymer) Resistant to moderate chemicals, acids, oils fats, grease many solvents and ozone. Attacked  by strong oxidizing acids, esters, ketones, chlorinated  aromatic, and nitro hydrocarbons. Neoprene has good weathering properties, is flame retarding and has good general physical properties.
.033"  (.84mm) Black Neoprene Nylon -60 F to +250 F  -51 C to +121 C

 Same As Above

.022"  (.55mm)

Pink Neoprene

Fiberglass

- 40 F TO +200 F -40 C TO +93 C

Self extinguishing, used when flame resistance is needed

.018"  (.45mm) Black Hypalon Nylon

- 60 F TO +300F -51 C TO +149 C

(CSM - Chlorosulfonated butadiene ) Very similar to Neoprene with improved acid resistance and high ozone resistance. Attacked by concentrated oxidizing acids, esters, ketones, chlorinated, aromatic, and nitro hydrocarbons. Very high ozone resistance. Hypalon ranks as one of the best elastomers for use in environments where corrosive chemicals are encountered, particularly oxidizing agents like sulfuric acid, chromates and hypachlorites.
.018"  (.45mm) Blue Hypalon Nylon

- 60 F TO +300F -51 C TO +149 C

 Same As Above

.018"  (.45mm) Green Hypalon Nylon

- 60 F TO +300F -51 C TO +149 C

 Same As Above

.032"  (.81mm) Silver Aluminum Fiberglass - 100F TO + 550 F - 73 C TO + 288 C Fiberglass is a man made material having as its main constituent, silica sand. Each fiber is a very tiny solid glass rod. Fiberglass has excellent heat resistance and is incombustible. It will start to melt at approximate 750 degrees F, but melting process proceeds very slowly until between 1300 degrees F and 150 degrees F when it becomes totally a liquid. Fiberglass can not absorb moisture so it won’t rot or decay and is resistant to acids, oils, many solvents, weather and corrosive vapors. Fiberglass with an aluminum cover allows the material a 95% reflective heat property that makes it a very good material in high heat use.
.022"  (.55mm) Gray Silicone Fiberglass - 100F TO + 550 F - 73 C TO + 288 C (SI - Organic Silicone Polymer) Generally resistant to moderate or oxidizing chemicals, ozone, concentrated sodium hydroxide. Fair resistance to alkalines. Attacked by many solvents, oils concentrated acids and diluted sodium hydroxide.
.022"  (.55mm) Red Silicone Fiberglass - 100F TO + 550 F - 73 C TO + 288 C

Same As Above

.010"  (.25mm) Brown Teflon Fiberglass - 100 F TO + 500 F - 73 C TO + 260 C (PTEE - Polytetrafluoroethylene - hexafluoropropylene ) Has very good chemical inertness and resistance to a wide range of fluids: there are only a few rare fluids that will attack Teflon. It has toughness over a temperature range of - 100 degrees F to + 500 degrees F. Teflon is a DuPont Trademark.
.010"
(.25mm)
PVC
(Brown
or Black)
Polyester -5 F TO + 158 F
- 20 C TO 
+70 C
PVC. Temperature 
varies with presence of chemicals and other factors. 

Material Resistance Specifications

Material

Oil

Animal & Vegetable Oil

Weather

Hydraulic Fluid (Silicates)

Abrasions

Aging

Flame

NEOPRENE COATED NYLON 3 1 1 3 1 1 3
HYPALON COATED NYLON 3 1 2 3 1 3 1
ALUMINUM COATED FIBERGLASS 3 3 4 4 4 4 1
SILICONE COATED FIBERGLASS 5 4 1 5 5 1 4
TEFLON COATED FIBERGLASS 1 2 1 1 1 1 2
Above Chart Codes: 1 = Excellent:  2 = Very Good:  3 = Good:  4 = Fair:  5 = Poor