Brazolet installation fittings with PVDF insert for the GF Signet 2551 insertion style Magmeter and the 515, 2536 & 2537 paddlewheel flow sensors.Other Details:Upto 8 in. - PVDF insert, over 8 in. - PVC insertFor use with copper pipe (SCH 40 ASTM)PTFE wetted material