How to distinguish the flat bottom lifter and the roller lifter

How to distinguish the flat bottom lifter and the roller lifter

The Flat Bottom lifter requires the use of a specially developed material that will endure the constant wiping pressure of the rotating cam lobe.

engine parts valve tappet 13750-71010 DAIHATSU TOYOTA INA China Manufacturer (tappetracing.com)

SIZE:21.4*50.8mm

The Roller Lifter converts that wiping force into a rolling force using a roller bearing resulting in a design that has less friction and a wider acceptance range of camshaft lobe profiles.

https://www.tappetracing.com/valve-lifter-tappet/63270579.html

Interchange Part Number:
Elgin HL-2205S| Ford Racing M-6500-R302| Melling J-2205 JB-2205| Sealed Power HT-2205
1995-1996 FORD BRONCO 5.0L 302CID V8 OHV
1992 FORD BRONCO 5.0L 302CID V8 OHV
1995 FORD BRONCO 5.8L 351CID V8 OHV
1996 FORD E-150 ECONOLINE CLUB WAGON 5.0L 302CID V8 OHV
1994 FORD E-150 ECONOLINE CLUB WAGON 5.8L 351CID V8 OHV
1995-1996 FORD E-150 ECONOLINE 5.8L 351CID V8 OHV
1994-1996 FORD E-250 ECONOLINE 5.8L 351CID V8 OHV
1994-1996 FORD E-350 ECONOLINE CLUB WAGON 5.8L 351CID V8 OHV
1994-1996 FORD E-350 ECONOLINE 5.8L 351CID V8 OHV
1996-2001 FORD EXPLORER 5.0L 302CID V8 OHV
1992-1996 FORD F-150 5.0L 302CID V8 OHV
1995-1996 FORD F-150 5.8L 351CID V8 OHV
1992-1996 FORD F-250 5.0L 302CID V8 OHV
1994-1997 FORD F-250 5.8L 351CID V8 OHV
1994-1997 FORD F-350 5.8L 351CID V8 OHV
1988-1991 FORD LTD CROWN VICTORIA 5.0L 302CID V8 OHV
1994-1995 FORD MUSTANG 5.0L 302CID V8 OHV
1986-1992 FORD MUSTANG 5.0L 302CID V8 OHV
1986 FORD THUNDERBIRD 5.0L 302CID V8 OHV
1989-1990 LINCOLN MARK VII 5.0L 302CID V8 OHV
1986-1990 LINCOLN TOWN CAR 5.0L 302CID V8 OHV
1986 MERCURY CAPRI 5.0L 302CID V8 OHV
1987-1991 MERCURY COLONY PARK 5.0L 302CID V8 OHV
1986-1988 MERCURY COUGAR 5.0L 302CID V8 OHV
1986-1990 MERCURY GRAND MARQUIS 5.0L 302CID V8 OHV
1997-2000 MERCURY MOUNTAINEER 5.0L 302CID V8 OHV