Length: 10 3/8" Width: 2 7/8" Height: 1 11/32"

539 11 20-57

and 12-0302

40 Max PSI

Cast Iron Housing

Proven Part Aerator Chain Kit Fits Classen 4173503 4172864-01 4172864-02 4172864-03 Z320M Length: 10 3/8" Width: 2Pack of Six Aerator Chains With Connecting Links. This Kit will Contain 2 of Each Chain With The Following Part Numbers 4172864 01 4172864 02 4172864 03 Two #50 X 67 Pitch Chains Compatible With Part Number 4172864 01. Two #50 X 63 Pitch Chains Compatible With Part Number 4172864 02. Two #50 X 59 Pitch Chains Compatible With Part Number 4172864 03. Fits The Following Classen Aerator Models: SA 30 SN 0000 Thru 0299 StandAire Pro, SA 30 S N 0000 0124