Melling Chain Tensioner - BT420 Part #: BT420 Line: MEL Melling Chain Tensioner 1 Year Limited Warranty Height (in): 1.660 Inch Height (mm): 42.2mm Length (in): 2.083 Inch Length (mm): 52.91mm Width (in): 2.900 Inch Width (mm): 73.66mm Adjustable: Yes Bracket Included: Yes Bolts Included: No Mounting Hole Diameter (in): 0.330 Inch Housing Material: Cast Iron Instructions Included: No Spring Included: Yes Piston Material: Steel Number Of Mounting Holes: 2 Gasket Or Seal Included: No Number Of Rows: 1 Shoe Included: No Mounting Hole Diameter (mm): 8.4mm Tensioner Actuation Type: Hydraulic Show More Show Less