Source: Insta-Chain, Inc.
Each arm is constructed of 3/4" thick A-36 steel between 12"-16" in length, depending on the model number of the chain unit.
A bolt attaches the arm to the cylinder bracket. Each arm rotates on two self-lubricating journal bearings. The cylinder bracket is also made of A-36 steel.
Insta-Chain, Inc., 995 South 1950 West, Suite B., Springville, UT 84663. Tel: 800-633-0699; Fax: 801-489-9797.