Eureka filter STK style, fits the Eureka stick vac style 96 and 169 series. Most of those models are Quick Up and Easy Clean II.
Replacement for Eureka vacuum cleaner filter part # 61544 and 61544A. For optimum performance, change STK filter every 6 months.
Examples of Eureka light weight vacs that use the Eureka STK filter include the:
Quick Up - 96DZ, 96F, 96H
Quick Up - 169B, 169D, 169GRN, 169MDR, 169TRQ, 169RBL, 169G
Quick Up 2-in-1 - 96JZ 96H 169D, 169GRN, 169MDR, 169RBL, 169TRQ, 169ARD, 169KYB, 169RYN, 169VBD
Easy Clean II 2-in-1 - 169B