Heftier bumpers replace the standard microplate bumpers that come with the SI-0400A single and SI-4000A Four-place microplate Genie mixer to be used when mixing PCR plates.
You must purchase four bumpers to hold PCR plates securely.
If your SI-4000A Digital Multi-MicroPlate Genie has a serial number lower than M4K-1390, you will also need to purchase this same pack of 4 shock absorbing feet.