These
Retube Kits are for the Marshall 30th Anniversary 6100 series Amps. This includes the 6100 and 6101.
The last option allows you to fully customize a kit exactly the way you want!
The 6100LM models came with 5881's and the 6100LE models came with EL34's. By the book most EL34 amps use 1K ohm screen grid resistors where 6L6 amps use 470 ohm. Marshall fitted the LM amps with hefty 5 watt 470 ohm resistors so running EL34 type tubes with these has not proven to be a problem.